String Template Filler

Fill placeholder variables in text templates (using Mustache/Handlebars syntax `{{name}}` or `${name}`) from a JSON data object or key-value list.

Why Use This Tool?

• Email & Message Personalization: Merge customer data JSON into bulk email body templates (`Dear {{firstName}}`).
• Code Generation: Populate boilerplates or config templates with project settings.
• Document Automation: Generate invoices, contracts, or letters from JSON records.

How to Use

1. Paste your template text containing `{{variable}}` placeholders.
2. Enter your JSON data object (e.g. `{"name": "Alice", "role": "Developer"}`).
3. View rendered output with all placeholders replaced.

Real Working Example

Input Text:

Template: Hello {{name}}, your role is {{role}}.
JSON: {"name": "Alice", "role": "Developer"}

Output Result:

Result: Hello Alice, your role is Developer.

Important Technical Details & Features

• Mustache & ES6 Template Support: Supports both `{{key}}` and `${key}` template placeholder syntaxes.
• Nested JSON Path Property Access: Access nested JSON properties using dot notation (`{{user.address.city}}`).
• Client-Side Privacy: Data objects and templates remain 100% private in browser memory.

Related Text & Developer Utilities

• Spintax Generator: Generate text variations.
• JSON Viewer: Inspect JSON objects.
• Find and Replace: Replace text strings.